usb: dwc3: gadget: Remove unnecessary checks

Remove 2 unnecessary checks:
1) A request in the started_list must have its trb field set. So
checking for req->trb is unnecessary.

2) An endpoint must have started (and have not ended) for the request to
still be in the started_list. There's no point to check if the endpoint
is started. We had this check because previously the driver didn't
handle the endpoint's started/ended flags for END_TRANSFER command
properly. See commit 9f45581f ("usb: dwc3: gadget: early giveback
if End Transfer already completed").
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/dwc3/gadget.c

@@ -1581,9 +1581,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 			/* wait until it is processed */
 			dwc3_stop_active_transfer(dep, true, true);
 
-			if (!r->trb)
-				goto out0;
-
 			/*
 			 * Remove any started request if the transfer is
 			 * cancelled.
@@ -1591,10 +1588,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 			list_for_each_entry_safe(r, t, &dep->started_list, list)
 				dwc3_gadget_move_cancelled_request(r);
 
-			if (dep->flags & DWC3_EP_TRANSFER_STARTED)
-				goto out0;
-			else
-				goto out1;
+			goto out0;
 		}
 		dev_err(dwc->dev, "request %pK was not queued to %s\n",
 				request, ep->name);
@@ -1602,7 +1596,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 		goto out0;
 	}
 
-out1:
 	dwc3_gadget_giveback(dep, req, -ECONNRESET);
 
 out0: